煤层开采后覆岩破坏规律研究新方法

电阻率法动态监测技术是研究煤层开采后覆岩破坏规律的一种新方法 ,该方法通过在采煤工作面覆岩中预埋入电极传感器,动态、连续的观测工作面回采前后上覆煤岩体电阻率及供电电流,根据电阻率及供电电流的变化情况分析工作面煤层开采后顶板岩层破坏的形态,查明工作面开采后覆岩"两带"发育的动态变化规律,得到煤层采后顶板"垮落带"和"导水裂缝带"的发育高度。

Resistivity method dynamic monitoring technology is a new method on the overburden failure law after mining coal bed. The mcth^xt is to dramatically, continuously observe the resistivity and supply current of overlying coal rock body beha＇e and after mining coalta.ce by the electrode sensors embedded into the coalface overburden, and then to analyze the damage form of the roof strata after mining tire coalface based ou the variation of resistivity and supply current, to find out the dynamic law of the ＂two belts＂ of the overburden and last to gel the growth latitude of ＇caving strap and ＇crack strap＇.